On May the 25th, every year, Terry Pratchett's fans make tribute to the creator of the Discworld and author of 41 novels and many other books about it. The Glorious 25th is the anniversary of the Glorious Revolution, which is something happened in "Night Watch", the 29th novel of the Discworld series. But it is also a day to celebrate Terry and think about the disease he died for. Following Terry's announcement about Alzheimer - in 2007 -, calls have been made to wear lilac on the 25th of May as a tribute, and to raise money for Alzheimer research.
This is the drawing I did this year and posted on some Terry Pratchett Fans groups.
(Yes, May 25th is also Towel Day. I celebrated it too ;) )
(Yes, I'm late, today it is May 29th. I know. Not too late to read Terry's books. GNU Pterry!)